The John Harris Bridge is a steel girder multilane highway bridge that carries Interstate 83 and the Capital Beltway across the Susquehanna River, connecting Harrisburg, Pennsylvania to Cumberland County (the East and West Shores of metropolitan Harrisburg).

It is also known locally as the South Bridge, in reference to the older Walnut Street, Market Street, and Harvey Taylor bridges upstream, which were the primary local automobile crossings at the time of its construction.

On the east shore, Central Iron and Steel and parts of the Shipoke neighborhood, both dating from the 19th century, were demolished to accommodate the bridge and its exit ramps into the downtown.

In 1997, the Expressway and bridge were designated as part of the Capital Beltway which loops the metropolitan area.

Lawsuits were filed against PennDOT, and in June 2022, Pennsylvania’s Commonwealth Court permanently blocked the P3 Initiative.